Flippers work, but holding them up for a few seconds makes them drop; they come back a moment later. Sometimes they get only the high-power drive and blow fuses.

Flippers die after being held a few seconds, then recover

Cause: A faulty diode or transistor on the flipper board, or more often the 4093 chips.

Checks

• Diode-test all diodes and transistors on the flipper board (0.5-0.7 V).

Fix

• If they test good, replace both 4093 chips, fitting sockets.

Systems

• Data East CPU Version 1/2
• Data East CPU Version 3
• Data East/Sega CPU Version 3b

Games

• Adventures of Rocky and Bullwinkle and Friends
• Back to the Future
• Batman
• Batman Forever
• Baywatch
• Checkpoint
• Guns N' Roses
• Hook
• Jurassic Park
• Last Action Hero
• Lethal Weapon 3
• Mary Shelley's Frankenstein
• Maverick
• Phantom of the Opera
• Robocop
• Star Trek
• Star Wars
• Tales from the Crypt
• Teenage Mutant Ninja Turtles
• The Simpsons
• The Who's Tommy Pinball Wizard
• WWF Royal Rumble

Related tips

• Solid state flipper goes up but will not stay up
• Flipper stuck up with power on (Playboy and later)
• Solid state flipper flutters when held
• Solid state flipper does not work: fuses and fuse clips
• Solid state flipper very weak: power side has failed
• Solid state flipper stays up only after the button is first pressed
• Protect the flipper boards when lifting the playfield
• Flipper EOS switch role from Jurassic Park on

Source: Repairing DataEast 1987 (Laser War) to Sega 1995 (Batman Forever), Part Two, Clay Harrell (pinrepair.com)